Shards may now also drop from regular creatures, very rare though. They always drop from the following "rare" creatures:

NOTE: These rare creatures all have a long respawn time. A common creature version of the rare signatures below will spawn in their place for the duration. When respawn time is complete, the common creature may need to be killed before the rare will spawn again.

Each of these creatures is the rare, signature, tougher, named version and all have a high change to drop a rare shard used in crafting. Listing of all Crafting Rare Components.